/* Hello, Emacs, this is -*-C-*- */
/*[
 * GNUPLOT - grass.trm
 *-
 * Copyright (C) 1992-1995, 1999, 2004 James Darrell McCauley
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the complete modified source code.  Modifications are to
 * be distributed as patches to the released version.  Permission to
 * distribute binaries produced by compiling modified sources is granted,
 * provided you
 *   1. distribute the corresponding source modifications from the
 *    released version in the form of a patch file along with the binaries,
 *   2. add special version identification to distinguish your version
 *    in addition to the base release version number,
 *   3. provide your name and address as the primary contact for the
 *    support of your modified version, and
 *   4. retain our contact information in regard to use of the base
 *    software.
 * Permission to distribute the released version of the source code along
 * with corresponding source modifications in the form of a patch file is
 * granted with same provisions 2 through 4 for binary distributions.
 *
 * This software is provided "as is" without express or implied warranty
 * to the extent permitted by applicable law.
 *
 * This software  is provided "as is" without express or implied warranty.
 *
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  GRASS graphics driver
 *
 * AUTHOR
 * James Darrell McCauley, PhD        http://soils.ecn.purdue.edu/~mccauley/
 * Dept of Agricultural Engineering   mccauley@ecn.purdue.edu
 * Purdue University                  tel: 317.494.1198 fax: 317.496.1115
 *
 * 05 Apr 1995 - cleaned up code by adding explicit function declarations.
 *               compiles clean with 'gcc -Wall'
 * 14 Apr 1995 - adapted for new layout, added font selection
 *
 * 13 Jan 1999 - Copyright statement changed to new gnuplot copyright
 *               Permission given by orig author in private email (lh)
 *
 * send your comments or suggestions to (grassp-list@moon.cecer.army.mil).
 *
]*/

#include "driver.h"

#ifdef TERM_REGISTER
register_term(grass)
#endif


#ifdef TERM_PROTO
TERM_PUBLIC void GRASS_move(unsigned int x, unsigned int y);
TERM_PUBLIC void GRASS_options(void);
TERM_PUBLIC void GRASS_init(void);
TERM_PUBLIC void GRASS_reset(void);
TERM_PUBLIC void GRASS_graphics(void);
TERM_PUBLIC void GRASS_text(void);
TERM_PUBLIC void GRASS_vector(unsigned int x, unsigned int y);
TERM_PUBLIC void GRASS_linetype(int lt);
TERM_PUBLIC void GRASS_put_text(unsigned int x, unsigned int y, const char *str);
TERM_PUBLIC int GRASS_text_angle(float ang);
TERM_PUBLIC int GRASS_justify_text(enum JUSTIFY mode);
TERM_PUBLIC void GRASS_point(unsigned int x, unsigned int y, int point);
TERM_PUBLIC int GRASS_set_font(const char *font);
#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY
#ifdef TERM_BODY

#include <stdio.h>
#include <string.h>
/* #include "gis.h" */ /* this causes conflicts with things in term.c */

#define GRASS_XMAX 1000
#define GRASS_YMAX 1000
#define GRASS_VCHAR 5
#define GRASS_HCHAR 5
#define GRASS_VTIC 3
#define GRASS_HTIC 3

#define PNT_SIZE 3
#define TYPE_DOT  -1
#define TYPE_X  0
#define TYPE_PLUS   1
#define TYPE_BOX    2
#define TYPE_DIAMOND    3	/* need type 4 and 5 */
#define TYPE_TRIANGLE 4
#define TYPE_OCTO 5
#define TYPE_ITRIANGLE 6
#define TYPE_FBOX 7
#define TYPE_FTRIANGLE 8
#define TYPE_FITRIANGLE 9
#define TYPE_FOCTO 10

static void cont_abs(int x, int y);
static void draw_points_dot(int x, int y);
static void draw_points_diamond(int x, int y);
static void draw_points_box(int x, int y);
static void draw_points_fbox(int x, int y);
static void draw_points_itriangle(int x, int y);
static void draw_points_fitriangle(int x, int y);
static void draw_points_triangle(int x, int y);
static void draw_points_ftriangle(int x, int y);
static void draw_points_plus(int x, int y);
static void draw_points_octo(int x, int y);
static void draw_points_focto(int x, int y);
static void draw_points_x(int x, int y);

static int R__curx, R__cury;

static int grass_yoffset;
static int grass_xoffset;
static int y_max;
static int points_buf_x[PNT_SIZE*PNT_SIZE]; /* for filled point types */
static int points_buf_y[PNT_SIZE*PNT_SIZE];

extern int R_move_abs ();
extern int R_cont_abs ();

TERM_PUBLIC void
GRASS_move(unsigned int x, unsigned int y)
{
  /* R_move_abs (grass_xoffset+x, grass_yoffset-y + y_max); */
  R_move_abs (grass_xoffset+x, grass_yoffset-y);
}

static void
cont_abs(int x, int y)
{
  /* R_cont_abs (grass_xoffset+x, grass_xoffset-y + y_max); */
  R_cont_abs (grass_xoffset+x, grass_yoffset-y);
}

TERM_PUBLIC void
GRASS_options()
{
  options_null ();		/* no options to begin with */
}

TERM_PUBLIC void
GRASS_init()
{
    /* char buff[128]; */
    char window_name[64];
    float size = 3.0;
    /* int backcolor; */
    int dots_per_line;
    int top, b, l, r;
    /* int textcolor; */
    struct termentry *t = term;

    extern int G_gisinit();
    extern int R_open_driver();
    extern int D_setup();
    extern int D_get_cur_wind();
    extern int G_fatal_error();
    extern int D_set_cur_wind();
    extern int D_get_screen_window();
    extern int R_set_window();
    extern int R_text_size();
    extern int R_font();
    extern int R_screen_top();
    extern int R_screen_bot();
    extern int D_erase_window();

    G_gisinit ("g.gnuplot");

    R_open_driver ();

    D_setup (0);

    if (D_get_cur_wind (window_name))
	G_fatal_error ("No current window");

    if (D_set_cur_wind (window_name))
	G_fatal_error ("Current window not available");

    /* Set up the screen, conversions, and graphics */
    D_get_screen_window (&top, &b, &l, &r);
    /* D_set_overlay_mode (1); */

    /* Figure out where to put text */

    R_set_window (top, b, l, r);
    t->xmax = r-l;
    t->ymax = b-top;
    grass_xoffset=l;
    grass_yoffset=b;

    dots_per_line = (int) (size / 100.0 * (float) (t->ymax));
    t->v_char = t->h_char = (int) (.8 * (float) dots_per_line);
    R_text_size (t->h_char, t->v_char);
    R_font("romans");

    t->v_tic = t->h_tic = 4;

    y_max = t->ymax; /* kludge? */

    R__curx = R_screen_top ();
    R__cury = R_screen_bot () + grass_yoffset;

    D_erase_window();

    fprintf(stderr,"**********************************************\n");
    fprintf(stderr,"DIAGNOSTIC TERMINAL SETUP\n");
    fprintf(stderr,"top = %d\tb = %d\tl = %d\tr = %d\n", top,b,l,r);
    fprintf(stderr,"name = %s\n", t->name);
    fprintf(stderr,"description = %s\n", t->description);
    fprintf(stderr,"xmax = %d\t", (int)t->xmax);
    fprintf(stderr,"ymax = %d\n", (int)t->ymax);
    fprintf(stderr,"v_char = %d\t", (int)t->v_char);
    fprintf(stderr,"h_char = %d\n", (int)t->h_char);
    fprintf(stderr,"v_tic = %d\t", (int)t->v_tic);
    fprintf(stderr,"h_tic = %d\n", (int)t->h_tic);
    fprintf(stderr,"**********************************************\n\n");
}

TERM_PUBLIC void
GRASS_reset ()
{
    extern int R_standard_color();
    extern int D_translate_color();
    extern int R_flush();
    extern int R_stabilize();
    extern int R_close_driver();

    R_standard_color (D_translate_color ("black"));
    /* D_erase_window(); .* don't clear after g.gnuplot is finished */
    R_flush ();
    R_stabilize ();
    R_close_driver ();
}

TERM_PUBLIC void
GRASS_graphics ()
{
    extern int D_erase_window();
    extern int R_flush();
    extern int R_stabilize();
    extern int R_standard_color();
    extern int D_translate_color();

    R_flush ();
    R_stabilize ();
    R_standard_color (D_translate_color ("black"));
    D_erase_window();
    return;
}

TERM_PUBLIC void
GRASS_text ()
{
    extern int R_flush ();
    extern int R_stabilize ();

    R_flush ();
    R_stabilize ();
    return;			/* device can't be used as a terminal */
}

TERM_PUBLIC void
GRASS_vector(unsigned int x, unsigned int y)
{
    extern int R_flush ();
    extern int R_stabilize ();

    cont_abs (x, y);
    R_flush ();
    R_stabilize ();
}

TERM_PUBLIC void
GRASS_linetype(int lt)
{
    extern int R_standard_color();
    extern int D_translate_color();
    extern int R_flush ();
    extern int R_stabilize ();

    while (lt > 10) lt-=10;

    if (lt <= LT_BLACK)
	R_standard_color (D_translate_color ("gray"));
    else if (lt == LT_AXIS)
	R_standard_color (D_translate_color ("white"));
    else if (lt == 0)
	R_standard_color (D_translate_color ("red"));
    else if (lt == 1)
	R_standard_color (D_translate_color ("green"));
    else if (lt == 2)
	R_standard_color (D_translate_color ("magenta"));
    else if (lt == 3)
	R_standard_color (D_translate_color ("brown"));
    else if (lt == 4)
	R_standard_color (D_translate_color ("orange"));
    else if (lt == 5)
	R_standard_color (D_translate_color ("yellow"));
    else if (lt == 6)
	R_standard_color (D_translate_color ("blue"));
    else if (lt == 7)
	R_standard_color (D_translate_color ("violet"));
    else if (lt == 8)
	R_standard_color (D_translate_color ("indigo"));
    else if (lt == 9)
	R_standard_color (D_translate_color ("gray"));
    else /* if (lt == 10) */
	R_standard_color (D_translate_color ("white"));
    R_flush ();
    R_stabilize ();
    return;
}

/* originally /usr/grass4/src/display/d.label/cmd/label.c */

TERM_PUBLIC void
GRASS_put_text(unsigned int x, unsigned int y, const char *str)
{
    extern int R_text();
    extern int R_flush ();
    extern int R_stabilize ();

    if (strlen (str) == 0)
	return;

    GRASS_move (x, y);
    /* R_standard_color (D_translate_color ("white")); */
    R_text (str);
    R_flush ();
    R_stabilize ();
}

TERM_PUBLIC int
GRASS_text_angle (float ang)
{
  extern int R_text_rotation();

  R_text_rotation((float)ang);
  return TRUE;			/* GRASS can (?) rotate text */
}

TERM_PUBLIC int
GRASS_justify_text (enum JUSTIFY mode)
{
    return (FALSE);		/* don't mess with this now */
}


TERM_PUBLIC void
GRASS_point (unsigned int x, unsigned y, int point)
{
    switch (point) {
    case TYPE_DOT:
	draw_points_dot (x, y);
	break;
    case TYPE_X:
	draw_points_x (x, y);
	break;
    case TYPE_PLUS:
	draw_points_plus (x, y);
	break;
    case TYPE_BOX:
	draw_points_box (x, y);
	break;
    case TYPE_DIAMOND:
	draw_points_diamond (x, y);
	break;
    case TYPE_TRIANGLE:
	draw_points_triangle (x, y);
	break;
    case TYPE_OCTO:
	draw_points_octo (x, y);
	break;
    case TYPE_ITRIANGLE:
	draw_points_itriangle (x, y);
	break;
    case TYPE_FBOX:
	draw_points_fbox (x, y);
	break;
    case TYPE_FTRIANGLE:
	draw_points_ftriangle (x, y);
	break;
    case TYPE_FITRIANGLE:
	draw_points_fitriangle (x, y);
	break;
    case TYPE_FOCTO:
	draw_points_focto (x, y);
	break;
    }
}

/* modified from /usr/grass4/src/display/d.points/cmd/main.c */

static void
draw_points_dot(int x, int y)
{
  GRASS_move (x, y);
  cont_abs (x, y);
}

static void
draw_points_diamond(int x, int y)
{
  GRASS_move (x, y + PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y);
  GRASS_vector (x, y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y);
  GRASS_vector (x, y + PNT_SIZE);
}

static void
draw_points_box(int x, int y)
{
  GRASS_move (x - PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y + PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y + PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y - PNT_SIZE);
}

static void
draw_points_fbox(int x, int y)
{
  int R_polygon_abs();
  points_buf_x[0] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[0]= grass_yoffset - (y + PNT_SIZE);
  points_buf_x[1] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[1]= grass_yoffset - (y + PNT_SIZE);
  points_buf_x[2] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[2]= grass_yoffset - (y - PNT_SIZE);
  points_buf_x[3] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[3]= grass_yoffset - (y - PNT_SIZE);
  R_polygon_abs(points_buf_x, points_buf_y, 4 );
}

static void
draw_points_itriangle(int x, int y)
{
  GRASS_move (x - PNT_SIZE, y + PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y + PNT_SIZE);
  GRASS_vector (x , y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y + PNT_SIZE);
}

static void
draw_points_fitriangle(int x, int y)
{
  int R_polygon_abs();

  points_buf_x[0] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[0] = grass_yoffset - (y + PNT_SIZE);
  points_buf_x[1] = grass_xoffset + x ;
  points_buf_y[1] = grass_yoffset - (y - PNT_SIZE);
  points_buf_x[2] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[2] = grass_yoffset - (y + PNT_SIZE);
  R_polygon_abs(points_buf_x, points_buf_y, 3 );
}

static void
draw_points_triangle(int x, int y)
{
  GRASS_move (x - PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x , y + PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y - PNT_SIZE);
}

static void
draw_points_ftriangle(int x, int y)
{
  int R_polygon_abs();

  points_buf_x[0] = grass_xoffset + x;
  points_buf_y[0]= grass_yoffset - (y + PNT_SIZE);
  points_buf_x[1] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[1]= grass_yoffset - (y - PNT_SIZE);
  points_buf_x[2] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[2]= grass_yoffset - (y - PNT_SIZE);
  R_polygon_abs(points_buf_x, points_buf_y, 3 );
}

static void
draw_points_plus(int x, int y)
{
  GRASS_move (x - PNT_SIZE, y);
  GRASS_vector (x + PNT_SIZE, y);
  GRASS_move (x, y - PNT_SIZE);
  GRASS_vector (x, y + PNT_SIZE);
}

/* depends on PNT_SIZE */
static void
draw_points_octo(int x, int y)
{
  /* CCW */
  GRASS_move (x - (int) (PNT_SIZE/3), y - PNT_SIZE);   /* 1 */
  GRASS_vector (x + (int) (PNT_SIZE/3), y - PNT_SIZE); /* 2 */
  GRASS_vector (x + PNT_SIZE, y - (int) (PNT_SIZE/3)); /* 3 */
  GRASS_vector (x + PNT_SIZE, y + (int) (PNT_SIZE/3)); /* 4 */
  GRASS_vector (x + (int) (PNT_SIZE/3), y + PNT_SIZE); /* 5 */
  GRASS_vector (x - (int) (PNT_SIZE/3), y + PNT_SIZE); /* 6 */
  GRASS_vector (x - PNT_SIZE, y + (int) (PNT_SIZE/3)); /* 7 */
  GRASS_vector (x - PNT_SIZE, y - (int) (PNT_SIZE/3)); /* 8 */
  GRASS_vector (x - (int) (PNT_SIZE/3), y - PNT_SIZE); /* 1 */
}

/* depends on PNT_SIZE */
static void
draw_points_focto(int x, int y)
{
  int R_polygon_abs();

  /* CCW */
  points_buf_x[0] = grass_xoffset + x + (int) (PNT_SIZE/3);
  points_buf_y[0] = grass_yoffset - (y - PNT_SIZE);
  points_buf_x[1] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[1] = grass_yoffset - (y - (int) (PNT_SIZE/3));
  points_buf_x[2] = grass_xoffset + x + PNT_SIZE;
  points_buf_y[2] = grass_yoffset - (y + (int) (PNT_SIZE/3));
  points_buf_x[3] = grass_xoffset + x + (int) (PNT_SIZE/3);
  points_buf_y[3] = grass_yoffset - (y + PNT_SIZE);
  points_buf_x[4] = grass_xoffset + x - (int) (PNT_SIZE/3);
  points_buf_y[4] = grass_yoffset - (y + PNT_SIZE);
  points_buf_x[5] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[5] = grass_yoffset - (y + (int) (PNT_SIZE/3));
  points_buf_x[6] = grass_xoffset + x - PNT_SIZE;
  points_buf_y[6] = grass_yoffset - (y - (int) (PNT_SIZE/3));
  points_buf_x[7] = grass_xoffset + x - (int) (PNT_SIZE/3);
  points_buf_y[7] = grass_yoffset - (y - PNT_SIZE);
  R_polygon_abs(points_buf_x, points_buf_y, 8 );
}

static void
draw_points_x(int x, int y)
{
  GRASS_move (x - PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x + PNT_SIZE, y + PNT_SIZE);
  GRASS_move (x + PNT_SIZE, y - PNT_SIZE);
  GRASS_vector (x - PNT_SIZE, y + PNT_SIZE);
}

TERM_PUBLIC int
GRASS_set_font(const char *font)
{
  char name[32];
  int size,sep, R_font();
  struct termentry *t = term;
  int R_text_size (), dots_per_line;

  /* G_warning(font); */

  sep=strcspn(font,",");
  strncpy(name,font,sep); name[sep]=NUL;
  sscanf (&(font[sep+1]),"%d",&size);

  if (size==0)
    size=3;
  dots_per_line = (int) (size / 100.0 * (float) (t->ymax));
  t->v_char = t->h_char = (int) (.8 * (float) dots_per_line);
  R_text_size (t->h_char, t->v_char);
/* cyrilc,gothgbt,gothgrt,gothitt,greekc,greekcs,greekp,
greeks,italicc,italiccs,italict,romanc,romancs,romand,
romans,romant,scriptc,scripts */

  if (strlen(name) > 5 )
    R_font(name);
  else
    R_font("romans");
  return TRUE;
}

#endif /* TERM_BODY */

#ifdef TERM_TABLE
TERM_TABLE_START(grass_driver)
    "grass", "GRASS Graphics Monitor",
    GRASS_XMAX, GRASS_YMAX, GRASS_VCHAR, GRASS_HCHAR,
    GRASS_VTIC, GRASS_HTIC, GRASS_options, GRASS_init, GRASS_reset,
    GRASS_text, null_scale, GRASS_graphics, GRASS_move, GRASS_vector,
    GRASS_linetype, GRASS_put_text, GRASS_text_angle,
    GRASS_justify_text, GRASS_point, do_arrow, GRASS_set_font
TERM_TABLE_END(grass_driver)


#undef LAST_TERM
#define LAST_TERM grass_driver
#endif /* TERM_TABLE */
#endif /* TERM_PROTO_ONLY */


#ifdef TERM_HELP
START_HELP(grass)
"1 grass",
"?commands set terminal grass",
"?set terminal grass",
"?set term grass",
"?terminal grass",
"?term grass",
"?grass",
" Note: legacy terminal.",
" The `grass` terminal driver gives `gnuplot` capabilities to users of the ",
" GRASS geographic information system.  Contact grassp-list@moon.cecer.army.mil",
" for more information.  Pages are written to the current frame of the GRASS",
" Graphics Window.  There are no options."
END_HELP(grass)
#endif
